package prefuse.action.animate;
import prefuse.action.ItemAction;
import prefuse.visual.VisualItem;
/**
* Animator that linearly interpolates the size of a VisualItems.
*
* @author <a href="http://jheer.org">jeffrey heer</a>
*/
public class SizeAnimator extends ItemAction {
/**
* Create a new SizeAnimator that processes all data groups.
*/
public SizeAnimator() {
super();
}
/**
* Create a new SizeAnimator that processes the specified group.
* @param group the data group to process.
*/
public SizeAnimator(String group) {
super(group);
}
/**
* @see prefuse.action.ItemAction#process(prefuse.visual.VisualItem, double)
*/
public void process(VisualItem item, double frac) {
double ss = item.getStartSize();
item.setSize(ss + frac*(item.getEndSize() - ss));
}
} // end of class SizeAnimator